remove six, and use a Set instead
What does this MR do?
Removes GitLab's dependency on the Six gem, replacing its usage with a simple Set.
Are there points in the code the reviewer needs to double check?
TODO: remove the warnings (done!)
Why was this MR needed?
We aren't using most of the features of Six, and removing it will allow us to more easily refactor the general approach.
What are the relevant issue numbers?
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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CHANGELOG entry added -
Documentation created/updated -
API support added - Tests
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Added for this feature/bug -
All builds are passing
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Conform by the style guides -
Branch has no merge conflicts with master
(if you do - rebase it please) -
Squashed related commits together